---
schema_version: "secwatch.filing_event.v1"
accession: "0001493152-26-023367"
form_type: "8-K"
ticker: "PULM"
cik: "0001574235"
company_name: "Pulmatrix, Inc."
filed_at: "2026-05-15T12:20:20+00:00"
generated_at: "2026-05-15T12:26:51.220799+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Pulmatrix Q1 net loss $1.2M, cash $3.3M; merger with Eos SENOLYTIX set for Q3 2026

## Summary
- Net loss $1.172M ($0.32/share) vs $1.808M ($0.50/share) in Q1 2025; no revenue reported.
- Cash and equivalents $3.3M at March 31, 2026; going concern assumed through anticipated merger close.
- Merger agreement with Eos SENOLYTIX signed March 26, 2026; expected close Q3 2026; common stock holders get ~6% of combined co.
- Private placement of Series B convertible preferred stock from Eos affiliate raised $1.0M gross in March.
- R&D expense <$0.1M; G&A down to $1.3M from $1.8M; clinical programs on hold pending out-license.

## SEC filing metadata
- accession: 0001493152-26-023367
- form_type: 8-K
- ticker: PULM
- cik: 0001574235
- company_name: Pulmatrix, Inc.
- filed_at: 2026-05-15T12:20:20+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1574235/000149315226023367/0001493152-26-023367-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1574235/000149315226023367/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001493152-26-023367
- JSON: https://secwatch.observer/filing/0001493152-26-023367.json
- Plain text: https://secwatch.observer/filing/0001493152-26-023367.txt

## Key facts
- Earnings Releases
  Pulmatrix, Inc. reported financial results for first fiscal quarter ended March 31, 2026.
  - Period: first fiscal quarter ended March 31, 2026
  - Result: reported results
  source text: Pulmatrix, Inc. issued a press release announcing its financial results for the first fiscal quarter ended March 31, 2026
  evidence_url: https://www.sec.gov/Archives/edgar/data/1574235/000149315226023367/0001493152-26-023367-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.